package cn.tedu;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

public class Demo04 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入用户名");
        String username = scanner.nextLine();
        System.out.println("请输入密码");
        String password = scanner.nextLine();
        try (Connection conn = DBUtils.getConn()){

            String sql="select password from user where username=?";
            PreparedStatement ps=conn.prepareStatement(sql);
            ps.setString(1,username);
            ResultSet rs= ps.executeQuery();
            if(rs.next()){
                String pw =rs.getString(1);
                if (pw.equals(password)){
                    System.out.println("登录成功");
                }else {
                    System.out.println("密码错误!");
                }
            }else {
                System.out.println("用户名不存在!");
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}
